High efficiency range hood

ABSTRACT

A high efficiency range hood includes a housing and a smoke exhausting device. The smoke exhausting device includes a snail-shaped air chamber, an air turbine installed in the air chamber, and an electric motor installed in the air chamber for rotating the air turbine. The air chamber has an air inlet and at least one air outlet. The housing has at least one knockout portion that communicates with the air outlet. The knockout portion communicates with the external air outlet pipe.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a range hood. In particular, thepresent invention relates to a high efficiency range hood.

2. Description of Related Art

Range hoods in the markets that include a housing and a smoke exhaustingdevice installed in the housing doest not meet the specifications of theUS energy star, including the efficiency rate (airflow at low speed/lowspeed power) >2.8 (cubic feet/min/power), the noise at low speed <2.0Sone, and the airflow at low speed ≧100(cubic feet/min/power).

SUMMARY OF THE INVENTION

One particular aspect of the present invention is to provide a highefficiency range hood that meets the specifications of the US energystar, including the efficiency rate (airflow at low speed/low speedpower) >2.8 (cubic feet/min/power), the noise at low speed <2.0 Sone,and the airflow at low speed ≧100 (cubic feet/min/power), and itsstructure is simple.

Another particular aspect of the present invention is to provide a highefficiency range hood. There are knockout portions at the back surfaceand top of the housing and can be easily linked with the air outletpipe. The installation is simple.

The high efficiency range hood includes a housing and a smoke exhaustingdevice. The smoke exhausting device includes a snail-shaped air chamber,an air turbine installed in the air chamber, and an electric motorinstalled in the air chamber for rotating the air turbine. The airchamber has an air inlet and at least one air outlet. The housing has atleast one knockout portion that communicates with the air outlet. Theknockout portions links with the external air outlet pipe.

There is a fan guard around the air inlet of the air chamber.

The air turbine includes an installation bottom board, a curved fanblade fastened on the installation bottom board, and a fastening frameconnected with the curved fan blade.

The air outlet on the air chamber includes two side air outlets and abottom air outlet. The knockout portions on the housing includes a firstknockout portion installed on the back surface of the housing and twotop knockout portions located on the top of the housing. The frontsurface of the housing has a vent. The first knockout portion located onthe back surface of the housing communicates with the side air outlet.The two top knockout portions located on the top of the housingcommunicates with the bottom air outlet.

A recirculation venting cover is also included that is fastened with theair chamber and links with a front air outlet. The outlet of therecirculation venting cover communicates with the vent on the frontsurface of the housing and links with the vent.

The housing further is installed with a filter.

For further understanding of the present invention, refer to thefollowing detailed description illustrating the embodiments and examplesof the present invention. The description is for illustrative purposeonly and is not intended to limit the scope of the claim.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded perspective view of the range hood of the presentinvention;

FIG. 2 is a perspective view of the range hood of the present inventionwithout filter;

FIG. 3 is an exploded perspective view of FIG. 2; and

FIG. 4 is another exploded perspective view of FIG. 2.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Reference is made to FIGS. 1-4. The high efficiency range hood includesa housing 6 and a smoke exhausting device installed in the housing 6.The smoke exhausting device includes a snail-shaped air chamber 5, anair turbine 3 installed in the air chamber 5, and an electric motor 4installed in the air chamber 5 for rotating the air turbine 3. The airchamber 5 has an air inlet 52 and at least one air outlet. The housing 6has at least one knockout portion that communicates with the air outlet.The knockout portion communicates with the external air outlet pipe.

In this embodiment, the housing 6 also is installed with a filter 1. Thefilter 1 is installed on the housing 6 and can be disassembled for easyclean and replace. The air inlet 52 is round-shaped or has other shape.There is a fan guard 2 around the air inlet 52 of the air chamber 5. Theair turbine 3 includes an installation bottom board 32, a curved fanblade 33 fastened on the installation bottom board 32, and a fixed frame31 connected with the curved fan blade 33. The air turbine 3 isinstalled with the electric motor 4 via the installation bottom board 32so that the electric motor 4 rotates the air turbine 3 to exhaust theair with oil.

The air outlet on the air chamber 5 includes two side air outlets 51, 53and a bottom air outlet 54. The two side air outlets 51, 53 are locatedat two sides of the air chamber 5. The bottom air outlet 54 is locatedon one surface of the air chamber 5 that is opposite to a surface withthe air inlet 52. The knockout portion on the housing 6 includes a firstknockout 61 located on a back surface of the housing 6 and two topknockout portions 63, 64 located on the top of the housing 6. The firstknockout portion 61 and the top knockout portions 64 are rectangular.The top knockout portion 63 is round-shaped. When the first knockoutportion 61 and the top knockouts 63, 64 are not used, the first knockoutportion 61 and the top knockout portions 63, 64 are sealed with boardwith corresponding shape. When the first knockout portion 61 and the topknockout portions 63, 64 are used, the boards are removed. A frontsurface of the housing 6 has a vent 62. The vent 62 is composed of aplurality of holes that are disposed at intervals. The first knockoutportion 61 located on the back surface of the housing 6 communicateswith the side air outlet 51. The two top knockout portions 63, 64located on the top of the housing 6 communicates with the bottom airoutlet 54.

A recirculation venting cover 7 is also included. The two sides of therecirculation venting cover 7 respectively form an inlet 71 and anoutlet 72. The inlet 71 of the recirculation venting cover 7 is fastenedwith the air chamber 5 and communicates with a side air outlet 53. Theoutlet 72 of the recirculation venting cover 7 communicates with thevent 62 located on the front surface of the housing 6.

When the external air outlet pipe needs to be linked with the top of thehousing 6, one of the top knockout portions 63, or 64 is opened. Whenthe external air outlet pipe needs to be linked with the back surface ofthe housing 6, the back knockout portion 61 or the vent 62 is opened.The installation process is simple.

The air exhausting device has a snail-shaped air chamber 5 and an airturbine 3. The air chamber 5 has an air inlet 52 and air outlet. Thehousing 6 has knockout portion and the knockout portion is linked withthe external air outlet pipe. Thereby, the efficiency of the air exhaustis high and meets the specifications of the US energy star, includingthe efficiency rate (airflow at low speed/low speed power) >2.8 (cubicfeet/min/power), the noise at low speed <2.0 Sone, and the airflow atlow speed ≧100 (cubic feet/min/power), and its structure is simple.Furthermore, the back surface of the housing 6 has a first knockoutportion 61 and the top of the housing 6 has top knockout portions 63, 64that can be easily connected with the external air outlet pipe. Theinstallation process is easy.

The description above only illustrates specific embodiments and examplesof the present invention. The present invention should therefore covervarious modifications and variations made to the herein-describedstructure and operations of the present invention, provided they fallwithin the scope of the present invention as defined in the followingappended claims.

1. A high efficiency range hood, comprising: a housing; and a smokeexhausting device disposed in the housing, wherein the smoke exhaustingdevice includes a snail-shaped air chamber, an air turbine installed inthe air chamber, and an electric motor installed in the air chamber forrotating the air turbine, the air chamber has an air inlet and at leastone air outlet, the housing has at least one knockout portion thatcommunicates with the air outlet, and the knockout portion communicateswith an external air outlet pipe.
 2. The high efficiency range hood asclaimed in claim 1, wherein the air chamber has a fan guard around theair inlet thereof.
 3. The high efficiency range hood as claimed in claim1, wherein the air turbine includes an installation bottom board, acurved fan blade fastened on the installation bottom board, and afastening frame connected with the curved fan blade.
 4. The highefficiency range hood as claimed in claim 1, wherein the air outlet onthe air chamber include two side air outlets and a bottom air outlet,the knockout portion on the housing includes a first knockout portioninstalled on the back surface of the housing and two top knockoutportions located on the top of the housing, the front surface of thehousing has a vent, the knockout portions located on the back surface ofthe housing communicates with one of the side air outlets, and the twotop knockout portions located on the top of the housing communicateswith the bottom air outlet
 5. The high efficiency range hood as claimedin claim 4, further comprising a recirculation venting cover that isfastened with the air chamber and communicates with one of the side airoutlets, wherein the outlet of the recirculation venting covercommunicates with the vent on the side surface of the housing.
 6. Thehigh efficiency range hood as claimed in claim 1, wherein the housingfurther has a filter.